Sleepy Hollow, IL 60122 Frost Dates
Frost dates for Sleepy Hollow, IL, ZIP 60122
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/13, about 163 frost-free days later.
The USDA Plant Hardiness Zone Map puts Sleepy Hollow in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5b around Sleepy Hollow has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sleepy Hollow compares
About 163 days separate Sleepy Hollow's last and first frost, putting it 31,395 of 40,283 ZIP codes nationally. Within IL, it ranks 1,523 of 1,548.
Learn more
local microclimates explains what one yard in Sleepy Hollow can differ from the 60122 normal, and zone vs. frost date explains why Zone 5b and Sleepy Hollow's frost date answer different questions.